Hoooooooo boy do I disagree. It's anecdotal, of course, but when Uni and Nintendo announced it I had a ton of friends commenting on Facebook that they would be going to Universal for this.
Even if there is crossover, it's going to bring all those people back to the parks for sure.
I agree.
Even if they were to have visit, no doubt they would visit just for Nintendo and buy lots of merch. Uni will more than likely try to sell lots of Universal-Only merchandise. Especially if Uni decided to do wand type pokemon stuff